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produce, in the two sketch maps, a faithful comparison of the 
present state with the past record. It was shown and described 
how the greatest change in the Falls has been in the centre of the 
great Fall between Goat Island and the Canadian side, where the 
bulk of the water passes over; and the edge of the cataract has 
worn back, it is considered, fully 200ft. in the 200 years at that 
point. A rock island that existed 200 years ago off the Canadian 
side, corresponding to the present Terrapin Rock Isle, off the Goat 
Island, has been swept away. The Table Rock that fell fifty years 
ago, formed a portion of a larger projection of Father Hennepin’s 
time, from the Canadian side, somewhat N.W. of the Rock Isle 
that had been destroyed. The fall that had just taken place 
adjoined the cliff near the former position of the Table Rock to 
South. The Gull island, which was a large island within the 
memory of living people, is now so nearly gone that it is quite 
overlooked, unless specially looked for with an opera glass. The 
Terrapin Rock has greatly diminished ; a large prospect-tower upon 
it had to be removed on account of the breaking away of the rock. 
The greatest force of the stream is in the centre, past Gull Island, 
and impinging on the Canadian shore where Table Rock was; and 
where the course of the stream has to be turned at right angles. 
The next object to disappear will be Terapin Rock and Gull 
Island. The centre of the Table will cut its way back, probably, 
with increasing rapidity, from the deepening of the channel 
forming a trough at the centre leading to a still greater and greater 
force of water to wear away the rock at that part. 
XXVI.—Local Foraminifera.—By Cotonet Horstey. 
At the same time, Colonel Horsley exhibited microscopic 
slides of Foraminifere, which he had gathered on the shore at 
Broadstairs at one of the Summer Excursions. 
XXVII.—Lvening devoted to Exhibits. 
MARCH 10, 1887. 
Colonel Cox.—Rare fresh water shells from Island of Hainan. 
Amongst those named were Dipsas plicata (Leach), Unio Cumingii 
(Lea), Hyrva elongata Anadonta gibba (Benson). 
Mr. W. E. Goulden.—Seaweeds from Cherbourg, well mounted 
but unnamed. 
Microscopic Slides, Colonel Horsley.—Foraminifera—Broad- 
stairs, Mediterranean, West Indies. Mr. J. Fielding. —Rock 
Sections—ersantite, showing Pleochroic, crystals of Biotite, 
Oligoclase, Felspar, Dichroism of Hornblende, Orthoclose Felspar, 
Leucite Dolorite, polarisation of Leucite, shewing cross hatching. 
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